"Melting and Solidification" Changes in State of Matter PPT Courseware 7 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Melting and Solidificat... | 20425次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Melting and Solidification" Changes in State of Matter PPT Courseware 7 is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Melting and Solidification" Changes in State of Matter PPT Courseware 7, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Melting and Solidification" Changes in State of Matter PPT Courseware 7
molten iron"
1. Melting - the process by which a substance changes from solid to liquid.
iceberg
2. Solidification - the process of matter changing from liquid to solid.
Explore the temperature changes when solids melt
Ask a question: Do the temperature changes of different substances during the melting process from solid to liquid are the same?
Conjecture hypothesis: The melting process must be heated, so the material must absorb heat. The temperature may also be rising at this time.
conduct experiment:
(1) Four students form a group, and each group is divided into two groups.
(2) Understand the experimental device, as shown in the figure, emphasizing the use of alcohol lamps and thermometers.
(3) Group 1 explores the temperature changes when naphthalene melts.
The second team explored the temperature changes when paraffin melted.
Crystal melting characteristics:
Heat continues to be absorbed and the temperature remains constant.
Understand the crystal melting curve:
(1) The material in segment AB is in a solid state, indicating the process of crystal endothermic heating.
(2) The material in the BC segment is in a solid-liquid coexistence state, indicating the crystal melting process, absorbing heat, and the temperature remains unchanged.
(3) The material in segment CD is in a liquid state, which means that the liquid absorbs heat and heats up.
(4) Point B means that the material has reached the melting temperature, but has not started to melt, and the material is completely in a solid state; point C means that the crystal has just completely melted, and the material is in a liquid state.
Amorphous melting characteristics:
Continue to absorb heat and the temperature continues to rise.
Understand the crystal melting curve:
It means that amorphous crystals do not have a fixed melting temperature. The whole process attracts heat and the temperature continues to rise.
Rosin, asphalt, glass, etc. in nature are all amorphous.
Let me think about it
Now a certain substance starts to melt at 25 ℃, but does not melt completely until 75 ℃. I would like to ask: Is this substance crystalline or amorphous?
It’s amorphous crystal! Because the substance does not have a fixed melting temperature (melting point).
During the review class, the teacher wrote a couplet. The first couplet is "Ice water in the cup, the water freezes and the temperature does not drop"; the second couplet is "The water in the dish is ice, but the temperature of the frozen water does not rise". The material changes contained in the couplet are ______ and ______, reflecting a commonality which is ______.
Keywords: Teaching courseware on changes in the state of matter, teaching courseware on melting and solidification, download PPT courseware for the first volume of eighth-grade physics from the People's Education Press, download courseware on physics slides for eighth grade, download PPT courseware on changes in the state of matter, download PPT courseware on melting and solidification, .PPT Format;
For more information about the "Melting and Solidification Changes in State of Matter" PPT courseware, please click the Melting and Solidification ppt Changes in State of Matter ppt tag.
"Melting and Solidification" PPT courseware:
Contents of the first part of the PPT courseware "Melt and Solidify": Three states of matter: Take water as an example: ice rain, white gas, fog, dew, frost, snow, hail Water vapor Solid state: ice, frost, snow and hail Liquid state: rain, fog, dew, white gas Gaseous state: water Vapor (invisible to the human eye) ... ...
"Melting and Solidification" PPT:
"Melt and Solidification" PPT Part 1 Content: State Changes Solid, liquid, and gaseous states are the three common states of matter. Solid state: such as aluminum, gold, silver, copper, iron, etc. are usually solid. Liquid state: such as water, vinegar, oil, etc. are usually liquid. Gaseous state: such as oxygen, hydrogen,...
"Exploring the Characteristics of Melting and Solidification" Material Forms and Their Changes PPT Courseware 2:
"Exploring the Characteristics of Melting and Solidification" Material Form and Its Changes PPT Courseware 2 Learning Objectives 1. Know what melting and solidification are. Understand the endotherms of melting and the exotherms of solidification. Know the characteristics of crystalline and amorphous melting and solidification. Understand the physical meaning of melting curves. 2. know..